The water supply to the sink (hot and cold) will also serve to supply the dishwasher, and is fed through two plastic pipes from the main riser in the cupboard. The conduits for this and the conduits for the electricity feeds were laid out on the floor, on top of the new insulation, ready for concreting over.
At this point I get a bit jittery, since any mistakes are set in concrete, literally. I suppose that in the worst case, I could pass a conduit over the ceiling behind the plasterboard, but I would really, really prefer not to have to do that.
And so, we're ready for concrete.